<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <title>Check whether the instance pointed by OID exists</title>

 </head>
 <body><div class="manualnavbar" style="text-align: center;">
 <div class="prev" style="text-align: left; float: left;"><a href="function.cubrid-insert-id.html">cubrid_insert_id</a></div>
 <div class="next" style="text-align: right; float: right;"><a href="function.cubrid-lob-close.html">cubrid_lob_close</a></div>
 <div class="up"><a href="ref.cubrid.html">CUBRID 函数</a></div>
 <div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="function.cubrid-is-instance" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">cubrid_is_instance</h1>
  <p class="verinfo">(PECL CUBRID &gt;= 8.3.0)</p><p class="refpurpose"><span class="refname">cubrid_is_instance</span> &mdash; <span class="dc-title">Check whether the instance pointed by OID exists</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.cubrid-is-instance-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="type">int</span> <span class="methodname"><strong>cubrid_is_instance</strong></span>
    ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$conn_identifier</code></span>  
   , <span class="methodparam"><span class="type">string</span> <code class="parameter">$oid</code></span>  
   )</div>

  <p class="para rdfs-comment">
    The <span class="function"><strong>cubrid_is_instance()</strong></span> function is used to check
    whether the instance pointed by the given <em><code class="parameter">oid</code></em>
    exists or not.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.cubrid-is-instance-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
  <dl>

    
  <dt>
<em><code class="parameter">conn_identifier</code></em></dt>

  <dd>
<p class="para">Connection identifier.</p></dd>

   
   
  <dt>
<em><code class="parameter">oid</code></em></dt>

  <dd>
<p class="para">OID of the instance that you want to check the existence.</p></dd>

   
  </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.cubrid-is-instance-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
    1, if such instance exists; 
  </p>
    <p class="para">
    0, if such instance does not exist; 
  </p>
    <p class="para">
    -1, in case of error
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.cubrid-is-instance-examples">
  <h3 class="title">范例</h3>
  <div class="example" id="example-1002">
   <p><strong>Example #1 <span class="function"><strong>cubrid_is_instance()</strong></span> example</strong></p>
   <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$conn&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">cubrid_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">33000</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"demodb"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$sql&nbsp;</span><span style="color: #007700">=&nbsp;&lt;&lt;&lt;EOD<br /></span><span style="color: #DD0000">SELECT&nbsp;host_year,&nbsp;medal,&nbsp;game_date&nbsp;<br />FROM&nbsp;game&nbsp;<br />WHERE&nbsp;athlete_code&nbsp;IN&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;(SELECT&nbsp;code&nbsp;FROM&nbsp;athlete&nbsp;WHERE&nbsp;name='Thorpe&nbsp;Ian');<br /></span><span style="color: #007700">EOD;<br /><br /></span><span style="color: #0000BB">$req&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">cubrid_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$sql</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">CUBRID_INCLUDE_OID</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$oid&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">cubrid_current_oid</span><span style="color: #007700">(</span><span style="color: #0000BB">$req</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$res&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">cubrid_is_instance&nbsp;</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$oid</span><span style="color: #007700">);<br />if&nbsp;(</span><span style="color: #0000BB">$res&nbsp;</span><span style="color: #007700">==&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"Instance&nbsp;pointed&nbsp;by&nbsp;</span><span style="color: #0000BB">$oid</span><span style="color: #DD0000">&nbsp;exists.\n"</span><span style="color: #007700">;<br />}&nbsp;else&nbsp;if&nbsp;(</span><span style="color: #0000BB">$res&nbsp;</span><span style="color: #007700">==&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">){<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"Instance&nbsp;pointed&nbsp;by&nbsp;</span><span style="color: #0000BB">$oid</span><span style="color: #DD0000">&nbsp;doesn't&nbsp;exist.\n"</span><span style="color: #007700">;<br />}&nbsp;else&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"error\n"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">cubrid_disconnect</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
   </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
Instance pointed by @0|0|0 doesn&#039;t exist.
</pre></div>
   </div>
  </div>
 </div>


   <div class="refsect1 seealso" id="refsect1-function.cubrid-is-instance-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
   <li class="member"><span class="function"><a href="function.cubrid-drop.html" class="function" rel="rdfs-seeAlso">cubrid_drop()</a> - Delete an instance using OID</span></li>   
   <li class="member"><span class="function"><a href="function.cubrid-get-class-name.html" class="function" rel="rdfs-seeAlso">cubrid_get_class_name()</a> - Get the class name using OID</span></li>
   </ul>
  </p>
  </div>


</div><hr /><div class="manualnavbar" style="text-align: center;">
 <div class="prev" style="text-align: left; float: left;"><a href="function.cubrid-insert-id.html">cubrid_insert_id</a></div>
 <div class="next" style="text-align: right; float: right;"><a href="function.cubrid-lob-close.html">cubrid_lob_close</a></div>
 <div class="up"><a href="ref.cubrid.html">CUBRID 函数</a></div>
 <div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
